<div class="form color-black">.form
    <div>.form-input--tabname</div>
    <div>
        <input type="text"
            class="form-input--tabname"
            placeholder="tabname" />
    </div>

    <div>.form-input--twitch</div>
    <div>
        <input type="text"
            class="form-input--twitch"
            placeholder="twitch" />
    </div>

    <div>.form-input--kageshi</div>
    <div>
        <input type="text"
               class="form-input--kageshi""
               placeholder="kageshi" />
    </div>
</div>
